CN209801899U - Multi-air door device for refrigerator - Google Patents

Abstract

the utility model discloses a many air door device that refrigerator was used, especially be three air door devices. The multi-air door device comprises an air door shell (1), a power driving mechanism (2) and a movement direction conversion mechanism (3); a plurality of air ports are formed in the air door shell (1), and an air door capable of being opened and closed freely is arranged on each air port; the power driving mechanism (2) controls a plurality of air doors corresponding to a plurality of air ports of the air door shell (1) to be opened or closed independently respectively through the movement direction conversion mechanism (3). The utility model discloses a many air door device especially is three air door devices, adopts the steerable a plurality of air doors independent switching respectively of single power drive mechanism to realize the air inlet combination of multiple condition, and the structure assembly is simple, and spare part is few, and is with low costs, and whole air door device is small, thereby low to the inner space occupancy of refrigerator, is favorable to the miniaturization of refrigerator.

Description

Multi-air door device for refrigerator

Technical Field

The utility model relates to a refrigerator air door technical field, concretely relates to many air door devices that refrigerator was used.

Background

With the advancement of technology, there is an increasing demand for functionally controlling the temperature of different zones inside the refrigerator, and therefore an increasing demand for the combination of the open and closed states of the damper.

However, most of the existing refrigerators using the damper device are single damper or double damper devices, and the practical use of the damper device with three dampers or more dampers in the refrigerator products has not yet appeared. The air inlet combination provided by a single double-air door device has only four states at most, and market requirements cannot be met. If more kinds of air inlet state combination, for example eight kinds of air inlet state combination of three air doors, need use two executor combinations of single air door + two air doors, controller/wire/walk line passageway etc. and all need set up two sets, can lead to refrigerator inner structure to further become complicated, and the assembly is more troublesome, and the inside space of taking up of refrigerator is many, is unfavorable for requirements such as the miniaturization of refrigerator, low energy consumption, low cost.

therefore, the need for a multi-damper device using one motor to drive three dampers or more to open and close independently, thereby forming eight or more air inlet state combinations, is more and more urgent. However, the introduction of the multi-damper device for the existing refrigerator generally has the defects of complex structure, high complexity of function realization and the like. For example, patent application publication No. CN108895750A discloses a multi-damper device, however, this multi-damper device needs to be realized through the cooperation of at least more than 15 gears in the process of realizing the opening and closing of more than three dampers, and not only the structure is complicated, the assembly is troublesome, and the cost is high, but also the volume of the whole damper device is increased, so that the space occupancy rate inside the refrigerator is high, which is not favorable for the miniaturization design of the refrigerator, and the practicability is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a many throttle devices that refrigerator was used to the defect or not enough of prior art. This many air door device, especially three air door devices adopt the independent switching respectively of the steerable a plurality of air doors of single power actuating mechanism to realize the air inlet combination of multiple condition, and structural assembly is simple, and spare part is few, and is with low costs, and whole air door device is small, thereby is low to the inner space occupancy of refrigerator, is favorable to the miniaturization of refrigerator.

The purpose of the utility model is realized through the following technical scheme.

a multi-air door device for a refrigerator is characterized by comprising an air door shell, a power driving mechanism and a movement direction conversion mechanism;

The air door shell is provided with a plurality of air ports, and each air port is respectively provided with an air door capable of being freely opened and closed; the power driving mechanism controls a plurality of air doors corresponding to a plurality of air ports of the air door shell to be opened or closed respectively and independently through the movement direction conversion mechanism.

In a preferred embodiment, the moving direction converting mechanism includes a guide rail, and the moving direction converting mechanism converts a linear movement of the guide rail in a longitudinal direction into a rotational movement required for opening and closing the damper.

a multi-damper apparatus for a refrigerator, which is a preferred embodiment, is preferably a three-damper apparatus; the air door shell is provided with three air ports, and each air port is respectively provided with an air door which can be freely opened and closed, namely a first air door, a second air door and a third air door; the motion direction conversion mechanism is a double-guide-rail motion direction conversion mechanism; and the power driving mechanism controls the first air door, the second air door and the third air door to be opened and closed independently respectively through the double-guide-rail movement direction conversion mechanism.

As a more preferred embodiment, the multi-damper device for a refrigerator, the dual guide movement direction conversion mechanism includes a first moving guide and a second moving guide;

the first moving guide rail and the second moving guide rail comprise guide rail panels; two side surfaces of a guide rail panel of the first movable guide rail are respectively provided with a first wave-shaped guide groove and a second wave-shaped guide groove; a third waveform guide groove is formed on one side surface of the guide rail panel of the second moving guide rail; the first wave guide groove, the second wave guide groove and the third wave guide groove are different in wave form;

The first air door, the second air door and the third air door are respectively in swing arm connection with the first wave guide groove, the second wave guide groove and the third wave guide groove through rocker arm components;

the first movable guide rail and the second movable guide rail are driven by the power driving mechanism to perform reciprocating movement; through the reciprocating movement of the first moving guide rail and the second moving guide rail, mutually different waveform tracks of the first waveform guide groove, the second waveform guide groove and the third waveform guide groove can form mutually independent rotating swing arms at the tail ends of the rocker arm assemblies corresponding to the waveform guide grooves, so that the first air door, the second air door and the third air door are driven to be respectively and independently opened and closed.

Preferably, the first wave guide groove, the second wave guide groove, and the third wave guide groove are wave guide grooves having the same amplitude and different wavelengths.

as a further preferred embodiment, the damper door apparatus for a refrigerator, wherein the guide panel of the first moving guide and the guide panel of the second moving guide are slidably provided to the damper housing through the main stand.

As a further preferred embodiment, the multi-damper device for a refrigerator further includes a rack bar provided on the rail panel; the output end of the power driving mechanism is in meshed transmission connection with the rack on the guide rail panel so as to drive the first movable guide rail and the second movable guide rail to reciprocate in a transmission manner.

As a further preferred embodiment, the rocker arm assembly includes a first rocker arm assembly, a second rocker arm assembly and a third rocker arm assembly, and the first damper, the second damper and the third damper are respectively connected with the first wave-shaped guide groove, the second wave-shaped guide groove and the third wave-shaped guide groove in a swing arm manner through the first rocker arm assembly, the second rocker arm assembly and the third rocker arm assembly in sequence;

The first rocker arm assembly, the second rocker arm assembly and the third rocker arm assembly comprise a supporting rod and a rocker arm; one end of the supporting rod is arranged on the wave-shaped guide groove in a sliding connection mode, the other end of the supporting rod is connected with one end of the rocker arm in a rotating mode, and the other end of the rocker arm is fixedly connected with the air door through a transmission shaft.

As a further preferred embodiment, the transmission shaft is rotatably provided to the damper housing through a bushing.

As a further preferred embodiment, the multi-damper device for a refrigerator, wherein a portion of the first wave guide groove on the guide rail panel of the first moving guide rail includes a straight groove having both ends parallel to the longitudinal direction and an inclined groove having a middle section inclined at an angle to the longitudinal direction; the part of the second waveform guide groove on the guide rail panel of the first moving guide rail is in a regular complete sine waveform along the length direction; the part of the third wave-shaped guide groove on the guide rail panel of the second moving guide rail comprises a straight groove with two ends parallel to the length direction and an inclined groove with the middle section forming an inclined angle with the length direction; the first wave guide groove, the second wave guide groove and the third wave guide groove have the same amplitude, the length of the part of the first wave guide groove on the guide rail panel of the first moving guide rail and the length of the part of the second wave guide groove on the guide rail panel of the first moving guide rail along the length direction are the same, and the length of the part of the third wave guide groove on the guide rail panel of the second moving guide rail along the length direction is half of the length of the part of the first wave guide groove on the guide rail panel of the first moving guide rail along the length direction;

the rocker arm assemblies corresponding to the first air door, the second air door and the third air door are all positioned on the same plane;

and the power driving mechanism drives the first moving guide rail and the second moving guide rail to perform semi-synchronous reciprocating movement through the transmission of the semi-synchronous transmission gear set.

As a further preferred embodiment of the multi-damper device for a refrigerator, the semi-synchronous transmission gear set includes a driving gear and a driven gear;

the axial direction of the driving gear is provided with a bulge, the axial direction of the driven gear is provided with a transverse rib corresponding to the bulge of the driving gear, and the transverse rib can block the bulge in the gear rotating direction; the driven gear is coaxially and rotatably arranged on the driving gear, and the driven gear synchronously rotates along with the driving gear only when the driving gear rotates to reach the contact between the protrusion and the transverse rib;

The gear part of the driving gear, which is used for being meshed and connected with the first moving guide rail, is half-missing gear; the driving gear is also provided with a full gear part which is coaxially arranged with the half-missing gear part, and the driving gear is meshed and connected with the output end of the power driving mechanism through the full gear part so as to drive the driving gear to rotate positively or negatively;

And the gear part of the driven gear, which is used for being in meshing connection with the second moving guide rail, is a missing gear.

Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:

the utility model discloses a many air door device especially is three air door devices, adopts the steerable a plurality of air doors of single power drive mechanism independent switching respectively to realize the air inlet combination of multiple condition, and the structure assembly is simple, and spare part is few, and is with low costs, and whole air door device is small, thereby low to the inner space occupancy of refrigerator, is favorable to the miniaturization of refrigerator, and the practicality is high, has wide application's prospect.

Drawings

Fig. 1 is a schematic view of the overall structure of a three-damper device for a refrigerator according to an embodiment of the present invention;

Fig. 2 is a schematic front view of a three-damper device for a refrigerator according to an embodiment of the present invention;

Fig. 3 is a schematic top view of a three-damper device for a refrigerator according to an embodiment of the present invention;

Fig. 4 is a schematic view of the internal structure of the triple-damper device for a refrigerator according to the present invention in the specific embodiment;

FIG. 5 is an enlarged view of the power driving mechanism and the dual-rail movement direction converting mechanism of the triple damper device for the refrigerator shown in FIG. 4;

Fig. 6 is a schematic view of an assembly structure of a rocker arm assembly and a guide rail in a double-guide-rail movement direction conversion mechanism of a three-damper device for a refrigerator according to an embodiment of the present invention;

fig. 7 is a schematic front view of a first guide rail in a double-guide-rail movement direction conversion mechanism of a three-damper device for a refrigerator according to an embodiment of the present invention;

fig. 8 is a schematic back side view of the first guide rail in the double guide rail movement direction conversion mechanism of the three damper device for the refrigerator according to the embodiment of the present invention;

fig. 9 is a schematic front view of a second guide rail in the double-guide-rail movement direction conversion mechanism of the three-damper device for the refrigerator according to the embodiment of the present invention;

fig. 10 is a schematic view of an assembly structure of a guide rail and a semi-synchronous transmission gear set in a double-guide-rail movement direction conversion mechanism of a three-damper device for a refrigerator according to an embodiment of the present invention;

Fig. 11 is a schematic structural view of a driving gear of a semi-synchronous transmission gear set in a double-guide-rail movement direction conversion mechanism of a three-damper device for a refrigerator according to an embodiment of the present invention;

fig. 12 is a schematic structural view of a driven gear of a semi-synchronous transmission gear set in a double-guide-rail movement direction conversion mechanism of a three-damper device for a refrigerator according to an embodiment of the present invention;

fig. 13 is a schematic view of the operation principle of the three damper device for a refrigerator according to the present invention in the embodiment;

The attached drawings are marked as follows: 1-air door shell, 101-first air door, 102-second air door, 103-third air door, 2-power driving mechanism, 3-motion direction conversion mechanism, 31-first moving guide rail, 32-second moving guide rail, 300-guide rail panel, 301-first wave guide groove, 302-second wave guide groove, 303-third wave guide groove, 304-rack, 33-rocker arm component, 331-first rocker arm component, 332-second rocker arm component, 333-third rocker arm component, 3301-support rod, 3302-rocker arm, 34-main bracket, 35-transmission shaft, 36-semi-synchronous transmission gear set, 361-driving gear, 3610-bulge, 3611-semi-tooth-missing gear portion, 3612-full-tooth gear portion, 3613-gear groove portion, 362-driven gear, 3620-transverse rib, 3621-gear part with missing teeth, 3622-gear extension, 400-power transmission shell, 401-top cover, 402-bottom shell.

Detailed Description

the technical solution of the present invention will be described in further detail with reference to the following specific embodiments and accompanying drawings, but the scope of protection and the implementation of the present invention are not limited thereto. In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are usually placed when the products of the present invention are used, or are used only for distinguishing descriptions, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be interpreted as limiting the present invention, nor indicating or implying relative importance.

In a specific implementation, the multi-damper device for a refrigerator of the present embodiment includes a damper housing 1, a power driving mechanism 2, and a movement direction conversion mechanism 3. A plurality of air ports are formed in the air door shell 1, and an air door capable of being opened and closed freely is arranged on each air port; the power driving mechanism 2 controls a plurality of air doors corresponding to a plurality of air ports of the air door shell 1 to be respectively and independently opened or closed through the movement direction conversion mechanism 3. In the specific embodiment, the power driving mechanism 2 is selected from a motor or a servo motor.

Wherein, in a preferred embodiment, said movement direction conversion means 3 comprises a guide rail. The movement direction conversion mechanism 3 can convert the linear movement of the guide rail along the length direction into the rotary movement required by the opening and closing of the air door. Through the arrangement of the movement direction conversion mechanism 3, the structure assembly of the whole air door device is simple, the number of parts is small, the cost is low, and the size of the whole air door device is small, so that the occupancy rate of the internal space of the refrigerator is low, and the miniaturization of the refrigerator is facilitated.

Example 1

Referring to fig. 1 to 5, a multi-damper device for a refrigerator according to the present embodiment is a three-damper device. Three air ports are formed in the air door shell 1, and each air port is provided with an air door capable of being opened and closed freely, namely a first air door 101, a second air door 102 and a third air door 103. In the present embodiment, the sides of the first damper 101, the second damper 102, and the third damper 103 located on the upper side are rotatably provided on the damper housing 1, so that the first damper 101, the second damper 102, and the third damper 103 can be freely opened and closed. The motion direction conversion mechanism 3 is a double-guide-rail motion direction conversion mechanism; the power driving mechanism 2 controls the first damper 101, the second damper 102 and the third damper 103 to be opened and closed independently through a double-guide-rail movement direction conversion mechanism. The power drive mechanism 2 of the present embodiment is selected as a motor.

Specifically, the three-damper device of this embodiment is a combination of a single damper and two dampers, and the single damper and the two dampers are located in the same plane. The power driving mechanism 2 and the double-guide-rail movement direction conversion mechanism 3 are arranged between the single air door and the double air doors, and the power driving mechanism 2 and the double-guide-rail movement direction conversion mechanism 3 are accommodated in a power transmission shell 400 fixedly connected with the single air door and the double air doors. The power transmission case 400 includes a bottom case 402 having a receiving cavity extending from the bottom toward the top for receiving the power driving mechanism 2 and the dual rail movement direction conversion mechanism 3, and a top cover 401 sealingly disposed on the top of the bottom case 402 by screw engagement. Further, wherein the third damper 103 is provided on the single damper housing, the first damper 101 and the second damper 102 are provided on the double damper, and the first damper 101 is located on the side close to the single damper.

in the present embodiment, referring to fig. 4 and 5, the dual-rail movement direction conversion mechanism includes a first moving rail 31 and a second moving rail 32. Wherein, the first moving rail 31 and the second moving rail 32 each comprise a rail panel 300; the first moving rail 31 has a first wave guide groove 301 and a second wave guide groove 302 on both sides of the rail panel 300; the second moving rail 32 has a third waveform guide groove 303 on one side surface of the rail panel 300; the first waveguiding groove 301, the second waveguiding groove 302, and the third waveguiding groove 303 are waveguiding grooves having the same amplitude and different wavelengths.

and the first damper 101, the second damper 102 and the third damper 103 are respectively in swing arm connection with the first wave guide groove 301, the second wave guide groove 302 and the third wave guide groove 303 through the rocker arm assembly 33.

the arrangement of the motion direction conversion mechanism of the double-moving guide rail and the rocker arm assembly 33 is used for providing the air door to perform the rotation motion required by opening and closing, so that the whole air door device is simple in structural assembly, few in parts, low in cost and small in size, the occupancy rate of the internal space of the refrigerator is low, and the refrigerator is favorably miniaturized.

The first moving guide rail 31 and the second moving guide rail 32 are driven by the power driving mechanism 2 to move in a reciprocating manner; through the reciprocating movement of the first moving guide rail 31 and the second moving guide rail 32, the different waveform tracks of the first waveform guide groove 301, the second waveform guide groove 302 and the third waveform guide groove 303 can form mutually independent rotating swing arms at the tail ends of the rocker arm assemblies 33 corresponding to the waveform guide grooves, so that the first air door 101, the second air door 102 and the third air door 103 are driven to be respectively and independently opened and closed.

In this embodiment, the guide panel 300 of the first moving rail 31 and the guide panel 300 of the second moving rail 32 are slidably provided on the damper housing 1 through the main bracket 34. The main frame 34 is fixedly installed between the housings of the single and double dampers in a fitting manner and is located in the power transmission housing 400, the main frame 34 is provided with a rail for the rail panel 300 of the first moving rail 31 and the rail panel 300 of the second moving rail 32 to slide, and the rail panel 300 of the first moving rail 31 and the rail panel 300 of the second moving rail 32 are provided with a sliding pin matched with the rail of the main frame 34, so that the first moving rail 31 and the second moving rail 32 can move along a predetermined linear direction.

Moreover, the guide rail panel 300 is further provided with a rack 304; the output end of the power driving mechanism 2 is engaged and connected with the rack 304 on the guide rail panel 300 in a transmission manner, so as to drive the first moving guide rail 31 and the second moving guide rail 32 to reciprocate.

In this embodiment, the rocker arm assembly 33 includes a first rocker arm assembly 331, a second rocker arm assembly 332, and a third rocker arm assembly 333, and the first damper 101, the second damper 102, and the third damper 103 are respectively connected to the first wave guide slot 301, the second wave guide slot 302, and the third wave guide slot 303 through the first rocker arm assembly 331, the second rocker arm assembly 332, and the third rocker arm assembly 333 in sequence in a swing arm manner.

Referring to fig. 6, the first rocker arm assembly 331, the second rocker arm assembly 332 and the third rocker arm assembly 333 each comprise a fulcrum 3301 and a rocker arm 3302; one end of the supporting rod 3301 is slidably connected to the wave-shaped guide groove, the other end of the supporting rod is rotatably connected with one end of the rocker arm 3302, and the other end of the rocker arm 3302 is fixedly connected with the air door through the transmission shaft 35.

the transmission shaft 35 is arranged on the air door shell 1 in a freely rotatable mode through a shaft sleeve, and the transmission shaft 35 is fixedly connected with the side edge of the air door located above the air door, so that the air door can be opened and closed freely in a turnover mode. In the present embodiment, the transmission shaft 35 for connecting the third damper 103 and the third rocker arm assembly 333 is disposed on the single damper housing through a bushing; and the transmission shaft 35 for connecting the first air door 101 with the first rocker arm assembly 331 and the transmission shaft 35 for connecting the second air door 102 with the second rocker arm assembly 332 are both arranged on the double-air door shell, the transmission shaft 35 for connecting the first air door 101 with the first rocker arm assembly 331 is arranged on the double-air door shell, and the transmission shaft 35 for connecting the second air door 102 with the second rocker arm assembly 332 is arranged by penetrating through the transmission shaft 35 for connecting the first air door 101 with the first rocker arm assembly 331.

when the guide rail works, the guide rail moves in a linear direction along the length direction of the guide rail, and the support rod 3301 is connected with one end of the corrugated guide groove and generates sliding motion on the track of the guide rail along with the linear motion of the guide rail. Further, since the track of the wave-shaped guide groove is wave-shaped in the longitudinal direction, the sliding motion of the pin 3301 on the wave-shaped guide groove takes on a wave-shaped sliding trajectory, and the end of the pin 3301 connected to the rocker arm 3302 takes on a vertically swinging motion trajectory. One end of the rocker 3302 is rotatably connected to the support rod 3301, and the other end of the rocker 3302 is fixedly connected to the transmission shaft 35, so that the rocker 3302 exhibits a rotary motion rotating around the fixed shaft under the guide of the vertical swing of the support rod 3301, thereby converting the linear motion of the guide rail into the rotary motion of the rocker 3302 and the transmission shaft 35, converting the motion direction, and providing the rotary motion required by the air door turning to turn the air door to open and close.

Further, as shown in fig. 7, the portion of the first wave guide groove 301 on the guide panel 300 of the first moving guide 31 includes a straight groove having both ends parallel to the longitudinal direction and a diagonal groove having an inclination angle of 135 ° with respect to the longitudinal direction. Referring to fig. 8, the portion of the second wave guide groove 302 on the rail panel 300 of the first moving rail 31 has a complete sinusoidal wave shape which is regular in the length direction. Referring to fig. 9, the portion of the third waveform guide groove 303 on the guide panel 300 of the second moving guide 32 includes a straight groove having both ends parallel to the longitudinal direction and a diagonal groove having an inclination angle of 45 ° with respect to the longitudinal direction.

The amplitudes of the first wavy guide groove 301, the second wavy guide groove 302, and the third wavy guide groove 303 are all the same, and the length of the portion of the first wavy guide groove 301 on the rail panel 300 of the first moving rail 31 and the length of the portion of the second wavy guide groove 302 on the rail panel 300 of the first moving rail 31 in the longitudinal direction are the same; the length of the portion of the third wave guide groove 303 on the rail panel 300 of the second moving rail 32 is half of the length of the portion of the first wave guide groove 301 on the rail panel 300 of the first moving rail 31, and thus the length of the rail panel 300 of the second moving rail 32 is also half of the length of the rail panel 300 of the first moving rail 31. In the present embodiment, the first wave guide groove 301 and the third wave guide groove 303 face each other.

also, of course, the positions of the first wavy guide groove 301 and the second wavy guide groove 302 may be interchanged.

The rocker arm assemblies 33 corresponding to the first damper 101, the second damper 102 and the third damper 103 are all located on the same plane.

Referring to fig. 10, the power driving mechanism 2 drives the first moving guide 31 and the second moving guide 32 to perform semi-synchronous reciprocating movement through the semi-synchronous transmission gear set 36.

specifically, the semi-synchronous transmission gear set 36 includes a driving gear 361 and a driven gear 362, and the driving gear 361 and the driven gear 362 have a semi-synchronous transmission connection relationship.

Referring to fig. 11, the center of the driving gear 361 is hollow; as shown in fig. 12, a gear extension 3622 extends upward from a central axis of the gear connection portion of the driven gear 362, a fixed shaft is installed in a hollow center of the gear extension 3622, the gear extension 3622 is matched with the hollow center of the driving gear 361, and the driven gear 362 is coaxially and rotatably installed on the driving gear 361 and can rotate on the driving gear 361 due to the matching of the gear extension 3622 and the hollow center of the driving gear 361. Further, as shown in fig. 11, the gear connecting portion of the driving gear 361 has a gear recess 3613 at the periphery of the central hollow portion in the axial direction; the edge of the gear connecting portion of the driven gear 362 has an axial slightly convex structure matched with the gear groove 3613, and when the driven gear 362 is rotatably mounted on the driving gear 361 through the gear extension 3622, the edge of the gear connecting portion of the driven gear 362 is also rotatably mounted on the groove 3613 of the driving gear 361.

More specifically, the driving gear 361 is disposed between the periphery of the central hollow portion of the driving gear 361 and the gear groove 3613, and has a protrusion 3610 along the axial direction of the driving gear 361. As shown in fig. 12, the driven gear 362 has a transverse rib 3620 corresponding to the protrusion 3610 of the driving gear 361 in the axial direction, the transverse rib 3620 is located between the periphery of the gear extension 3622 and the edge of the gear connecting portion of the driven gear 362, and the transverse rib 3620 can block the protrusion 3610 in the gear rotating direction. Thus, in the process of primary rotation when the driving gear 361 works, the driven gear 362 does not rotate along with the driving gear 361 at this time because the driven gear 362 and the driving gear 361 are not in clamping relation; and only when the driving gear 361 rotates to reach the protrusion 3610 and contacts with the transverse rib 3620, the driven gear 362 rotates synchronously with the driving gear 361, so that local synchronous transmission connection between the driving gear 361 and the driven gear 362 is realized, local synchronization of reciprocating motion of the double guide rails can be realized, and requirements are provided for realizing two swing arm motions which need local synchronous motion operation.

further, referring to fig. 11, in the present embodiment, the gear portion of the driving gear 361 for meshing with the first moving rail 31 is a half-missing tooth, and the half-missing tooth gear portion 3611 is located at a side close to the driven gear 362. The driving gear 361 further includes a full-tooth gear portion 3622 provided coaxially with the half-missing-tooth gear portion 3611, that is, the driving gear 361 includes two gear portions of the half-missing-tooth gear portion 3611 and the full-tooth gear portion 3612, and the full-tooth gear portion 3612 is located on a side away from the driven gear 362; the driving gear 361 is engaged with a power mechanism through a full gear portion 3612 to drive the driving gear 361 to rotate forward or backward.

Referring to fig. 12 again, in the present embodiment, the gear portion of the driven gear 362 includes a gear portion 3621 with missing teeth, and the gear portion 3621 with missing teeth is used for being in meshing connection with the second moving rail 32.

The operational principle flow chart of the three-damper device for the refrigerator of the present embodiment is shown in fig. 13. First, as shown in fig. 13, in the original operating state i, one end of the strut of the third rocker arm assembly 333 is located on the left straight guide slot of the third wave guide slot 303, one end of the strut of the second rocker arm assembly 332 is located on the rightmost wave peak of the second wave guide slot 302, one end of the strut of the first rocker arm assembly 331 is located on the rightmost side of the right straight guide slot of the first wave guide slot 301, and the first damper 101, the second damper 102 and the third damper 103 are all in the closed state. Then, the power driving mechanism 2 starts to drive the first moving guide rail 31 and the second moving guide rail 32 to start to move linearly through the semi-synchronous transmission gear set 36, and because the driving gear 361 and the driven gear 362 have a semi-synchronous connection relationship, before the power driving mechanism 2 drives the driving gear 361 to rotate and the protrusion 3610 is not in contact with the transverse rib 3620, the half-missing gear part 3611 of the driving gear 361 drives the first moving guide rail 31 to move rightwards first; in the operating state ii, one end of the strut of the second rocker arm assembly 332 reaches the rightmost trough of the second wave guide slot 302, and one end of the strut of the first rocker arm assembly 331 reaches the leftmost straight guide slot of the right side of the first wave guide slot 301, at which time the first damper 101 is opened and the second damper 102 is still closed; in the operating state iii, one end of the strut of the second rocker arm assembly 332 reaches the leftmost peak of the second wave guide groove 302, and one end of the strut of the first rocker arm assembly 331 reaches the bottommost of the inclined guide groove of the first wave guide groove 301, so that the first damper 101 is closed and the second damper 102 is opened; in the operating state iv, one end of the strut of the second rocker arm assembly 332 reaches the leftmost valley of the second wave guide groove 302, and one end of the strut of the first rocker arm assembly 331 reaches the leftmost valley of the left straight guide groove of the first wave guide groove 301, so that the first damper 101 is opened and the second damper 102 is also opened; in the operating states ii to iv, the third damper 103 is always in the closed state because the second moving rail 32 is not moved. Thereafter, the power driving mechanism 2 continues to drive the driving gear 361 to rotate and the protrusion 3610 contacts with the transverse rib 3620, so that the driven gear 362 starts to rotate synchronously with the driving gear 361, and the second moving guide rail 32 and the first moving guide rail 31 move synchronously; in the operating state v, the second moving rail 32 moves and one end of the supporting rod of the third rocker arm assembly 333 reaches the right straight guiding groove of the third waveform guiding groove 303, and at this time, the half-missing gear portion 3611 of the driving gear 361 no longer drives the first moving rail 31 to move continuously, and the first damper 101, the second damper 102 and the third damper 103 are all in an open state. Then, the power driving mechanism 2 rotates reversely and drives the driving gear 361 to rotate reversely, the protrusion 3610 is separated from the transverse rib 3620 and does not contact with the transverse rib, at this time, the first moving guide rail 31 moves leftwards reversely, and the second moving guide rail 32 does not move; in the operating state vi, one end of the strut of the second rocker arm assembly 332 returns to reach the leftmost peak of the second wave guide groove 302, one end of the strut of the first rocker arm assembly 331 returns to reach the bottommost of the inclined guide groove of the first wave guide groove 301, the first damper 101 is closed, and the second damper 102 is opened; in the operating state VII, one end of the strut of the second rocker arm assembly 332 returns to reach the rightmost trough of the second wave guide slot 302, and one end of the strut of the first rocker arm assembly 331 returns to reach the leftmost straight guide slot at the right of the first wave guide slot 301, at which time the first damper 101 is opened and the second damper 102 is closed; in the working state VIII, one end of the strut of the second rocker arm component 332 returns to the initial state of the rightmost wave crest of the second wave guide groove 302, one end of the strut of the first rocker arm component 331 returns to the initial state of the rightmost straight guide groove of the right side of the first wave guide groove 301, and the first air door 101 and the second air door 102 are both closed; in the operating states vi to viii, the third damper 103 remains in the open state because the second moving guide 32 does not move.

Based on the operating states i to viii of the above-described workflow, the opening and closing combination states of the first damper 101, the second damper 102, and the third damper 103 are shown in table 1.

TABLE 1 open/close combination of first damper 101, second damper 102 and third damper 103

where 0FF indicates OFF and ON indicates ON.

As can be seen from table 1, the multi-damper device for the refrigerator of the present embodiment employs a single power driving mechanism to control the three dampers to open and close independently, and can realize the combination of inlet air in eight states; and the multi-air door device of the embodiment has the advantages of simple structure assembly, few parts, low cost and small volume of the whole air door device, thereby having low occupancy rate of the internal space of the refrigerator, being beneficial to the miniaturization of the refrigerator, having high practicability and having wide application prospect.

Furthermore, the present invention provides a multi-damper device with three or more dampers, which can be preferably configured such that a wave guide groove is added to the first movable rail 31 or the second movable rail 32 on the basis of the three damper device, and a corresponding rocker arm assembly 33 is added at the same time, or a movable rail having a wave guide groove is added, and a rocker arm assembly 33 is added at the same time, thereby forming a damper device with three or more dampers.

The above embodiments are merely preferred embodiments of the present invention, and only lie in further detailed description of the technical solutions of the present invention, but the protection scope and the implementation manner of the present invention are not limited thereto, and any changes, combinations, deletions, replacements, or modifications that do not depart from the spirit and principles of the present invention will be included in the protection scope of the present invention.

Claims (10)

1. A multi-damper device for a refrigerator is characterized by comprising a damper shell (1), a power driving mechanism (2) and a movement direction conversion mechanism (3);

A plurality of air ports are formed in the air door shell (1), and an air door capable of being opened and closed freely is arranged on each air port; the power driving mechanism (2) controls a plurality of air doors corresponding to a plurality of air ports of the air door shell (1) to be opened or closed independently respectively through the movement direction conversion mechanism (3).

2. The multi-damper apparatus for a refrigerator according to claim 1, wherein the moving direction converting mechanism (3) includes a guide rail, and the moving direction converting mechanism (3) converts a linear movement of the guide rail in a length direction into a rotational movement required for opening and closing the damper.

3. A multi-damper apparatus for a refrigerator according to claim 1 or 2, wherein the multi-damper apparatus is a triple-damper apparatus; three air ports are formed in the air door shell (1), and each air port is provided with an air door which can be freely opened and closed, namely a first air door (101), a second air door (102) and a third air door (103); the motion direction conversion mechanism (3) is a double-guide-rail motion direction conversion mechanism; the power driving mechanism (2) controls the first air door (101), the second air door (102) and the third air door (103) to be opened and closed independently through the double-guide-rail movement direction conversion mechanism.

4. the multi-damper apparatus for a refrigerator according to claim 3, wherein the dual guide movement direction conversion mechanism includes a first moving guide (31) and a second moving guide (32);

the first moving guide (31) and the second moving guide (32) each comprise a guide panel (300); a first wave-shaped guide groove (301) and a second wave-shaped guide groove (302) are respectively arranged on two side surfaces of a guide rail panel (300) of the first moving guide rail (31); a third wave guide groove (303) is arranged on one side surface of the guide rail panel (300) of the second moving guide rail (32); the first wave guide groove (301), the second wave guide groove (302) and the third wave guide groove (303) are wave guide grooves with the same amplitude and different wavelengths;

the first air door (101), the second air door (102) and the third air door (103) are respectively in swing arm connection with the first wave-shaped guide groove (301), the second wave-shaped guide groove (302) and the third wave-shaped guide groove (303) through a rocker arm assembly (33);

the first moving guide rail (31) and the second moving guide rail (32) are driven by the power driving mechanism (2) to move in a reciprocating manner; through the reciprocating movement of the first moving guide rail (31) and the second moving guide rail (32), the different waveform tracks of the first waveform guide groove (301), the second waveform guide groove (302) and the third waveform guide groove (303) can form mutually independent rotating swing arms at the tail ends of the rocker arm assemblies (33) corresponding to the waveform guide grooves, so that the first air door (101), the second air door (102) and the third air door (103) are driven to be opened and closed respectively and independently.

5. The multi-damper apparatus for a refrigerator according to claim 4, wherein the rail panel (300) of the first moving rail (31) and the rail panel (300) of the second moving rail (32) are slidably provided on the damper housing (1) through a main bracket (34).

6. The multi-damper apparatus for a refrigerator according to claim 4, wherein the rail panel (300) is further provided with a rack (304); the output end of the power driving mechanism (2) is in meshed transmission connection with a rack (304) on the guide rail panel (300) so as to drive the first moving guide rail (31) and the second moving guide rail (32) to move in a reciprocating mode.

7. The multi-damper apparatus for a refrigerator according to claim 4, wherein the rocker arm assembly (33) comprises a first rocker arm assembly (331), a second rocker arm assembly (332) and a third rocker arm assembly (333), and the first damper (101), the second damper (102) and the third damper (103) are in swing arm connection with the first wave guide groove (301), the second wave guide groove (302) and the third wave guide groove (303) through the first rocker arm assembly (331), the second rocker arm assembly (332) and the third rocker arm assembly (333), respectively, in sequence;

the first rocker arm assembly (331), the second rocker arm assembly (332) and the third rocker arm assembly (333) each comprise a strut (3301) and a rocker arm (3302); one end sliding connection of branch (3301) sets up on the wave form guide slot, the other end with the one end of rocking arm (3302) is rotated and is connected, the other end of rocking arm (3302) passes through transmission shaft (35) and air door fixed connection.

8. The multi-damper apparatus for a refrigerator according to claim 7, wherein said transmission shaft (35) is rotatably provided to said damper housing (1) through a bushing.

9. A multi-wind door apparatus for a refrigerator according to any one of claim 4 ~ 8, wherein the portion of the first wave guide groove (301) on the rail panel (300) of the first moving rail (31) includes a straight groove having both ends parallel to the length direction and a diagonal groove having an intermediate section inclined to the length direction, the portion of the second wave guide groove (302) on the rail panel (300) of the first moving rail (31) has a full sine wave shape having both ends parallel to the length direction, the portion of the third wave guide groove (303) on the rail panel (300) of the second moving rail (32) includes a straight groove having both ends parallel to the length direction and a diagonal groove having an intermediate section inclined to the length direction, the amplitudes of the first wave guide groove (301), the second wave guide groove (302) and the third wave guide groove (303) are the same, the portion of the first wave guide groove (301) on the rail panel (300) of the first moving rail (31) and the portion of the second wave guide groove (302) on the rail panel (300) of the first moving rail (31) are the same length of the second wave guide groove (300) along the length direction, and the portion of the second wave guide groove (303) on the rail panel (300) is half of the length direction;

the rocker arm assemblies (33) corresponding to the first air door (101), the second air door (102) and the third air door (103) are all positioned on the same plane;

The power driving mechanism (2) drives the first moving guide rail (31) and the second moving guide rail (32) to perform semi-synchronous reciprocating movement through the transmission of a semi-synchronous transmission gear set (36).

10. The multi-damper apparatus for a refrigerator as claimed in claim 9, wherein the semi-synchronous transmission gear set (36) includes a driving gear (361) and a driven gear (362);

The axial direction of the driving gear (361) is provided with a bulge (3610), the axial direction of the driven gear (362) is provided with a transverse rib (3620) corresponding to the bulge (3610) of the driving gear (361), and the transverse rib (3620) can block the bulge (3610) in the gear rotating direction; the driven gear (362) is coaxially and rotatably arranged on the driving gear (361), and the driven gear (362) synchronously rotates along with the driving gear (361) only when the driving gear (361) rotates to reach the contact between the protrusion (3610) and the transverse rib (3620);

The gear part of the driving gear (361) for being meshed and connected with the first moving guide rail (31) is half-missing gear; the driving gear (361) is also provided with a full gear part which is coaxial with the half-missing gear part, and the driving gear (361) is meshed and connected with the output end of the power driving mechanism (2) through the full gear part so as to drive the driving gear (361) to rotate positively or reversely;

The gear part of the driven gear (362) for being in meshing connection with the second moving guide rail (32) is a missing gear.